diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0973-net-bcmgenet-Reset-RBUF-on-first-open.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0973-net-bcmgenet-Reset-RBUF-on-first-open.patch | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0973-net-bcmgenet-Reset-RBUF-on-first-open.patch b/target/linux/bcm27xx/patches-5.4/950-0973-net-bcmgenet-Reset-RBUF-on-first-open.patch deleted file mode 100644 index 6cf8a7c927..0000000000 --- a/target/linux/bcm27xx/patches-5.4/950-0973-net-bcmgenet-Reset-RBUF-on-first-open.patch +++ /dev/null @@ -1,70 +0,0 @@ -From 507c4d749a1bbc3eb5c364dda61ac6bf95026cf1 Mon Sep 17 00:00:00 2001 -From: Phil Elwell <phil@raspberrypi.com> -Date: Fri, 25 Sep 2020 15:07:23 +0100 -Subject: [PATCH] net: bcmgenet: Reset RBUF on first open - -If the RBUF logic is not reset when the kernel starts then there -may be some data left over from any network boot loader. If the -64-byte packet headers are enabled then this can be fatal. - -Extend bcmgenet_dma_disable to do perform the reset, but not when -called from bcmgenet_resume in order to preserve a wake packet. - -N.B. This different handling of resume is just based on a hunch - -why else wouldn't one reset the RBUF as well as the TBUF? If this -isn't the case then it's easy to change the patch to make the RBUF -reset unconditional. - -See: https://github.com/raspberrypi/linux/issues/3850 - -Signed-off-by: Phil Elwell <phil@raspberrypi.com> ---- - drivers/net/ethernet/broadcom/genet/bcmgenet.c | 16 ++++++++++++---- - 1 file changed, 12 insertions(+), 4 deletions(-) - ---- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c -+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c -@@ -2791,7 +2791,7 @@ static void bcmgenet_set_hw_addr(struct - } - - /* Returns a reusable dma control register value */ --static u32 bcmgenet_dma_disable(struct bcmgenet_priv *priv) -+static u32 bcmgenet_dma_disable(struct bcmgenet_priv *priv, bool flush_rx) - { - unsigned int i; - u32 reg; -@@ -2816,6 +2816,14 @@ static u32 bcmgenet_dma_disable(struct b - udelay(10); - bcmgenet_umac_writel(priv, 0, UMAC_TX_FLUSH); - -+ if (flush_rx) { -+ reg = bcmgenet_rbuf_ctrl_get(priv); -+ bcmgenet_rbuf_ctrl_set(priv, reg | BIT(0)); -+ udelay(10); -+ bcmgenet_rbuf_ctrl_set(priv, reg); -+ udelay(10); -+ } -+ - return dma_ctrl; - } - -@@ -2911,8 +2919,8 @@ static int bcmgenet_open(struct net_devi - - bcmgenet_set_hw_addr(priv, dev->dev_addr); - -- /* Disable RX/TX DMA and flush TX queues */ -- dma_ctrl = bcmgenet_dma_disable(priv); -+ /* Disable RX/TX DMA and flush TX and RX queues */ -+ dma_ctrl = bcmgenet_dma_disable(priv, true); - - /* Reinitialize TDMA and RDMA and SW housekeeping */ - ret = bcmgenet_init_dma(priv); -@@ -3666,7 +3674,7 @@ static int bcmgenet_resume(struct device - bcmgenet_power_up(priv, GENET_POWER_WOL_MAGIC); - - /* Disable RX/TX DMA and flush TX queues */ -- dma_ctrl = bcmgenet_dma_disable(priv); -+ dma_ctrl = bcmgenet_dma_disable(priv, false); - - /* Reinitialize TDMA and RDMA and SW housekeeping */ - ret = bcmgenet_init_dma(priv); |